243122350213 has 2 divisors, whose sum is σ = 243122350214. Its totient is φ = 243122350212.

The previous prime is 243122350187. The next prime is 243122350217. The reversal of 243122350213 is 312053221342.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135576394849 + 107545955364 = 368207^2 + 327942^2 .

It is a cyclic number.

It is not a de Polignac number, because 243122350213 - 2⁵ = 243122350181 is a prime.

It is a super-2 number, since 2×243122350213² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243122350217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121561175106 + 121561175107.

It is an arithmetic number, because the mean of its divisors is an integer number (121561175107).

Almost surely, 2^243122350213 is an apocalyptic number.

It is an amenable number.

243122350213 is a deficient number, since it is larger than the sum of its proper divisors (1).

243122350213 is an equidigital number, since it uses as much as digits as its factorization.

243122350213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 243122350213 its reverse (312053221342), we get a palindrome (555175571555).

The spelling of 243122350213 in words is "two hundred forty-three billion, one hundred twenty-two million, three hundred fifty thousand, two hundred thirteen".